[Event "IBM"]
[Site "Amsterdam"]
[Date "1965.??.??"]
[Round "7"]
[White "Szabo, Laszlo"]
[Black "Zuidema, Coen"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. a3 Bxc3+ 6. bxc3 b6 7. Bd3 Bb7 8. f3 O-O 9. e4 Ne8 10. Be3 Nc6 11. Ne2 Ba6 12. Qa4 Na5 13. dxc5 d6 14. cxb6 axb6 15. Kf2 Qc8 16. Rhb1 Bxc4 17. Qc2 Bxd3 18. Qxd3 Nc4 19. Rb4 d5 20. exd5 exd5 21. Bxb6 Qc6 22. Bd4 Rxa3 23. Rxa3 Nxa3 24. Nf4 Nc7 25. Rb6 Qa4 26. Rb7 Rc8 27. Qf5 Qc2+ 28. Qxc2 Nxc2 29. Be5 Ne8 30. Nxd5 Kf8 31. Rb8 Rxb8 32. Bxb8 f6 33. Ke2 Kf7 34. Kd2 Na3 35. Kd3 Ke6 36. c4 Nd6 37. Ne3 Nb7 38. Kc3 Na5 39. Bg3 1-0